Verified - ntpd ignores the year part of refclock timestamps

Hal Murray hmurray at
Thu Aug 31 00:35:38 UTC 2017

>> How many of the NMEA devices have GPS rollover problems?
>> (either now or soon)

> It's impossible to tell.  When a device will roll over is, because of the
> pivot-date trick, not a function of its hardware type but of its firmware
> release. --  

Are there any known examples?

I have a collection of NMEA toys.  I don't remember seeing GPS rollover on 
any of them.  Some of them are quite old, but I don't think any have reached 
20 years yet.

We could test fixup software by setting the system clock ahead far enough to 
look like GPS had rolled over.

These are my opinions.  I hate spam.

More information about the devel mailing list